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今天来详细介绍一下LoadManager、ResourceManager。LoadManager和ResourceManager主要负责框架的资源加载和管理，话不多说直接开始。
LoadManager
LoadManager主要的功能有：
- 提供资源加载的接口
- 提供资源卸载的接口
- 持有、管理AsyncOperationHandle句柄对象
- Loader类的创建于调用
LoadManager定义了多种加载方式的接口。加载单个资源、加载多个资源、加载场景。接口参数由资源名称、加载回调方法组成。代码如下：
/// <summary>异步加载资源（单个）</summary>
/// <param name="pAssetName">资源名称</param>
/// <param name="pLoadCallback">加载回调</param>
public void LoadAssetAsync(string pAssetName, Action<bool> pLoadCallback = null)
{LoadAsset(pAssetName, ELoadType.LoadAssetAsync, pLoadCallback);
}/// <summary>异步加载资源（多个）</summary>
/// <param name="pLabelsName">Labals</param>
/// <param name="pLoadCallback">加载回调</param>
public void LoadAssetsAsyc(string pLabelsName, Action<bool> pLoadCallback = null)
{LoadAsset(pLabelsName, ELoadType.LoadAssetsAsyc, pLoadCallback);
}/// <summary>加载场景</summary>
/// <param name="pSceneName"></param>
/// <param name="pLoadCallback"></param>
public void LoadSceneAsyc(string pSceneName, Action<bool> pLoadCallback = null)
{LoadAsset(pSceneName, ELoadType.LoadSceneAsyc, pLoadCallback);
}不同的加载接口最终统一调用LoadAsset方法。LoadAsset负责Loader的创建与加载接口的调用。LoadAsset内通过调用Loader的加载接口进行资源加载。创建出来的Loader会被进行缓存，在加载完成后会移除对应的Loader。这样做的目的是避免同一资源重复。
为避免资源的重复加载，AsyncOperationHandle句柄会被保存在成员对象mHandleDictionay中，根据资源名称的HashCode来进行判断。如果已经加载过，则直接返回。
private Dictionary<int, AsyncOperationHandle> mHandleDictionay = new Dictionary<int, AsyncOperationHandle>();
private Dictionary<int, Loader> mLoaderDictionary = new Dictionary<int, Loader>();private void LoadAsset(string pAssetName, ELoadType pLoadType, Action<bool> pLoadCallback = null)
{int loaderId = pAssetName.GetHashCode();if (mHandleDictionay.ContainsKey(loaderId)){pLoadCallback?.Invoke(true);return;}Loader loader = CreateLoader(loaderId, pLoadCallback);if (loader != null){switch (pLoadType){case ELoadType.LoadAssetAsync:loader.LoadAssetAsync(pAssetName);break;case ELoadType.LoadAssetsAsyc:loader.LoadAssetsAsync(pAssetName);break;case ELoadType.LoadSceneAsyc:loader.LoadSceneAsync(pAssetName);break;}}
}private Loader CreateLoader(int loaderId, Action<bool> pLoadCallback = null)
{Loader loader = null;if (!mLoaderDictionary.ContainsKey(loaderId)){loader = new Loader(loaderId, pLoadCallback);mLoaderDictionary.Add(loaderId, loader);}return loader;
}接下来说一下Loader类。Loader类的主要功能有：
- 提供资源加载的接口。
- 负责Addressables资源加载接口的调用。
- 持有LoaderId、mLoadCallback（加载回调）、mAsyncOperationHandle（加载句柄）这些成员变量。
- 完成加载后的处理。
Loader类提供了多种对应Addressables加载资源的接口，加载单个资源、加载多个资源、加载场景。这些接口实现了Addressables对资源加载的调用。
资源加载完成后统一回调LoadComplete方法，LoadComplete会传入AsyncOperationHandle参数。加载成功后会在LoadManager移除Loader，在LoadManager添加AsyncOperationHandle，在ResourceManager添加资源等操作。
private class Loader
{private int mLoaderId = -1;private Action<bool> mLoadCallback = null;private AsyncOperationHandle mAsyncOperationHandle = default;public Loader(int loaderId, Action<bool> pLoadCallback = null){mLoaderId = loaderId;mLoadCallback = pLoadCallback;}#region AsyncOperationHandle.Completedpublic void LoadAssetAsync(string pAssetName){mAsyncOperationHandle = Addressables.LoadAssetAsync<UnityEngine.Object>(pAssetName);mAsyncOperationHandle.Completed += LoadComplete;}public void LoadAssetsAsync(string pLabelsKey){mAsyncOperationHandle = Addressables.LoadAssetsAsync<UnityEngine.Object>(pLabelsKey, null);mAsyncOperationHandle.Completed += LoadComplete;}public void LoadSceneAsync(string pSceneName){mAsyncOperationHandle = Addressables.LoadSceneAsync(pSceneName);mAsyncOperationHandle.Completed += LoadComplete;}#endregionprivate void LoadComplete(AsyncOperationHandle pHandle){if (pHandle.Status == AsyncOperationStatus.Succeeded){ManagerCollection.LoadManager.RemoveLoader(mLoaderId);ManagerCollection.LoadManager.AddHandle(mLoaderId, pHandle);ManagerCollection.ResourceManager.AddAsset(pHandle.Result);mLoadCallback?.Invoke(true);}else if (pHandle.Status == AsyncOperationStatus.Failed){Debug.LogWarning(pHandle.OperationException.Message);mLoadCallback?.Invoke(false);}}
}这里只展示了LoadManager的部分代码，关于完整代码，各位同学可以在文章最后获取Git下载工程。
ResourceManager
ResourceManager主要功能有：
- 持有、管理各类型资源（类型包括：AudioClip、GameObject、TextAsset、Texture等等）。
- 提供各类型资源获取的接口。
- 提供添加资源的接口。
- 提供移除资源的接口。
ResourceManager内定义了多个用于存储不同类型的Dictionary。
public class ResourceManager : ManagerBase<ResourceManager>
{private Dictionary<string, AudioClip> mAudioClipDictionary = new Dictionary<string, AudioClip>();private Dictionary<string, GameObject> mGameObjectDictionary = new Dictionary<string, GameObject>();private Dictionary<string, TextAsset> mTextAssetDictionary = new Dictionary<string, TextAsset>();public Dictionary<string, Texture> mTextureDictionary = new Dictionary<string, Texture>();private Dictionary<string, Sprite> mSpriteDictionary = new Dictionary<string, Sprite>();
}在LoadManager中提到过，加载成功后会调用ResourceManager的AddAsset方法进行资源的添加。AddAsset会根据资源类型，调用不同的添加方法，将资源保存到对应的Dictionary中。代码如下：
public void AddAsset(object pResult)
{if (pResult is List<UnityEngine.Object>){List<UnityEngine.Object> assetList = pResult as List<UnityEngine.Object>;for (int index = 0; index < assetList.Count; index++){AddAsset(assetList[index]);}}else{if (pResult is AudioClip)AddAudioClip(pResult);else if (pResult is GameObject)AddGameObject(pResult);else if (pResult is TextAsset)AddTextAsset(pResult);else if (pResult is Texture)AddTexture(pResult);else if (pResult is Sprite)AddSprite(pResult);}
}private void AddAudioClip(object pAssetObject)
{AudioClip audioClip = pAssetObject as AudioClip;if (!mAudioClipDictionary.ContainsKey(audioClip.name))mAudioClipDictionary.Add(audioClip.name, audioClip);
}private void AddGameObject(object pAssetObject)
{GameObject gameObj = pAssetObject as GameObject;if (!mGameObjectDictionary.ContainsKey(gameObj.name))mGameObjectDictionary.Add(gameObj.name, gameObj);
}ResourceManager为每一个类型的资源定义了获取资源的方法。这里之所以为每一个类型都定义一个接口，是为了在调用ResourceManager的资源获取接口时，清楚的知道有哪些接口可以使用，并清楚的知道接口返回什么类型的结果。
public AudioClip GetAudioClip(string pAudioClipName)
{if (mAudioClipDictionary.ContainsKey(pAudioClipName))return mAudioClipDictionary[pAudioClipName];elsereturn null;
}public GameObject GetGameObject(string pGameObjectName)
{if (mGameObjectDictionary.ContainsKey(pGameObjectName))return mGameObjectDictionary[pGameObjectName];elsereturn null;
}最后就是移除资源的接口，与添加接口类似，每个类型的资源一一对应。
public void RemoveAsset(object pResult)
{if (pResult is List<UnityEngine.Object>){List<UnityEngine.Object> assetList = pResult as List<UnityEngine.Object>;for (int index = 0; index < assetList.Count; index++){RemoveAsset(assetList[index]);}}else{if (pResult is AudioClip)RemoveAudioClip(pResult);else if (pResult is GameObject)RemoveGameObject(pResult);else if (pResult is TextAsset)RemoveTextAsset(pResult);else if (pResult is Texture)RemoveTexture(pResult);else if (pResult is Sprite)RemoveSprite(pResult);}
}private void RemoveAudioClip(object pAssetObject)
{AudioClip audioClip = pAssetObject as AudioClip;if (mAudioClipDictionary.ContainsKey(audioClip.name))mAudioClipDictionary.Remove(audioClip.name);
}private void RemoveGameObject(object pAssetObject)
{GameObject gameObj = pAssetObject as GameObject;if (mGameObjectDictionary.ContainsKey(gameObj.name))mGameObjectDictionary.Remove(gameObj.name);
}有关ResourceManager就先介绍到这里，这里只展示了部分代码，关于完整代码，各位同学可以在文章最后获取Git下载工程。
相关链接
Release-Framework-Client客户端框架Git：https://gitee.com/huoyixian/release-framework-client
Manager模块介绍：https://blog.csdn.net/huoyixian/article/details/145613966